Good news first. I just played through the latest version on a Tandy. I loved the new areas and everything worked perfectly. Really enjoyed finding all the extra lore that was added.
I thought I'd try it out in EGA as well with the MT-32 but I'm not having so much luck. The game runs fine but I'm not getting more than a couple of hanging notes from the MT-32. I've tried this on a 286, 486 and Pentium II, none of which worked correctly. They are all using MPU-401 emulator cards of various sorts to connect to the MT-32. I've never had any problems with other games so there seems to be an issue of some sort with your MIDI drivers.